Mitsubishi Electric MELSEC iQ-R Series User Manual page 94

■Setting a dead band
Set the non-alert area having the set value (SV) at the center (temperature width in which no loop disconnection is detected)
to prevent accidental alerts of the loop disconnection detection.
When the temperature process value (PV) is within the loop disconnection detection dead band, an alert is not output even
though the loop disconnection alert conditions have been satisfied.
Configure the setting as follows:
[Navigation window]  [Parameter]  Target module  [Application Setting]  [Loop disconnection detection setting] 
[Loop disconnection detection dead band]
When this function is not necessary, set 0 for "Loop disconnection detection dead band" of "Loop
disconnection detection setting" in "Application Setting."
1 FUNCTIONS
92
1.29 Loop Disconnection Detection Function